Cassini Measures Tug of Enceladus

Cassini Measures Tug of Enceladus Artist's concept of Cassini's flyby of Saturn's moon Enceladus. Image credit: NASA/JPL
  • submit to reddit

April 26, 2010

NASA's Cassini spacecraft will be gliding low over Saturn's moon Enceladus for a gravity experiment designed to probe the moon's interior composition. The flyby, which will take Cassini through the water-rich plume flaring out from Enceladus's south polar region, will occur on April 27 Pacific time and April 28 UTC. At closest approach, Cassini will be flying about 100 kilometers (60 miles) above the moon's surface.

Cassini's scientists plan to use the radio science instrument to measure the gravitational pull of Enceladus against the steady radio link to NASA's Deep Space Network on Earth. Detecting any wiggle will help scientists understand what is under the famous "tiger stripe" fractures that spew water vapor and organic particles from the south polar region. Is it an ocean, a pond or a great salt lake?

The experiment will also help scientists find out if the sub-surface south polar region resembles a lava lamp. Scientists have hypothesized that a bubble of warmer ice periodically moves up to the crust and repaves it, explaining the quirky heat behavior and intriguing surface features.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate in Washington. The Cassini orbiter was designed, developed and assembled at JPL.

More information about the Cassini-Huygens mission is at:
http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov.

Jia-Rui C. Cook 818-354-0850
Jet Propulsion Laboratory, Pasadena, Calif.
jia-rui.c.cook@jpl.nasa.gov

2010-140



Researchers found that Titan's ice shell, which overlies a very salty ocean Ocean on Saturn Moon Could be as Salty as the Dead Sea

› Read more

With help from the public, members of NASA's Cassini mission have chosen to call the spacecraft's Cassini Names Final Mission Phase Its 'Grand Finale'

› Read more

Cassini celebrates a decade in the Saturn system on June 30, 2014. Image credit: NASA/JPL-Caltech Cassini Celebrates 10 Years Exploring Saturn

› Read more


Get JPL Updates
Sign Up for JPL UpdatesRegister today and receive up-to-the-minute e-mail alerts delivered directly to your inbox.
Sign Up for JPL Updates